changed looks like server

-const recorder = require('node-record-lpcm16');
+const express = require('express');
+const multer = require('multer');
+const fs = require('fs');
+const upload = multer();
+const app = express(); 
+const port = 5501;
+app.use(express.static('./'));
+async function testGoogleTextToSpeech(audioBuffer) {
+    const speech = require('@google-cloud/speech');
+    const client = new speech.SpeechClient();
+    const audio = {
+    content: audioBuffer.toString('base64'),
+    };
+    const encoding = 'LINEAR16';
+    const sampleRateHertz = 48000;
+    const languageCode = 'ko-KR';
+    const speechContexts = [{
+        phrases: [
+        '$$OOV_CLASS_ALPHANUMERIC_SEQUENCE 는 $OOV_CLASS_ALPHANUMERIC_SEQUENCE',
+        '$OOV_CLASS_ALPHANUMERIC_SEQUENCE 는 $OOV_CLASS_ALPHANUMERIC_SEQUENCE 보다 크다',
+        '$OOV_CLASS_ALPHANUMERIC_SEQUENCE 는 $OOV_CLASS_ALPHANUMERIC_SEQUENCE 보다 작다',
+        'for OOV_CLASS_ALPHA_SEQUENCE in range $OOV_CLASS_ALPHANUMERIC_SEQUENCE',
+        'if',
+        '이프',
+        'else if',
+        '엘스 이프',
+        'else',
+        '엘스',
+        'while',
+        '와일',
+        '함수',
+        '파라미터',
+        'parameter',
+        '변수 선언',
+        '함수 선언',
+        '반복문 선언',
+        '조건문 선언'
+        ],
+        boost: 20
+    }]
 
 
-// Imports the Google Cloud client library
-const speech = require('@google-cloud/speech');
-
-
-// Creates a client
-const client = new speech.SpeechClient();
-
-/**
- * TODO(developer): Uncomment the following lines before running the sample.
- */
-const encoding = 'LINEAR16';
-const sampleRateHertz = 16000;
-const languageCode = 'ko-KR';
-const speechContexts = [{
-  phrases: [
-    '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_ALPHA_SEQUENCE', '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_DIGIT_SEQUENCE',
-    '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_ALPHA_SEQUENCE 보다 크다',
-    '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_ALPHA_SEQUENCE 보다 작다',
-    '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_DIGIT_SEQUENCE 보다 크다',
-    '$OOV_CLASS_ALPHA_SEQUENCE 는 $OOV_CLASS_DIGIT_SEQUENCE 보다 작다',
-    'for OOV_CLASS_ALPHA_SEQUENCE in range $OOV_CLASS_DIGIT_SEQUENCE',
-    'if',
-    '이프',
-    'else if',
-    '엘스 이프',
-    'else',
-    '엘스',
-    'while',
-    '와일',
-    '함수',
-    '파라미터',
-    'parameter',
-    '변수 선언',
-    '함수 선언',
-    '반복문 선언',
-    '조건문 선언'
-  ],
-  boost: 20
-}]
-
-const request = {
-  config: {
-    encoding: encoding,
-    sampleRateHertz: sampleRateHertz,
-    languageCode: languageCode,
-    alternativeLanguageCodes: ['en-US'],
-    speechContexts: speechContexts
-  },
-  interimResults: false, // If you want interim results, set this to true
-};
-
-// Create a recognize stream
-const recognizeStream = client
-  .streamingRecognize(request)
-  .on('error', console.error)
-  .on('data', data =>
-    process.stdout.write(
-      data.results[0] && data.results[0].alternatives[0]
-        ? `Transcription: ${data.results[0].alternatives[0].transcript}\n`
-        : '\n\nReached transcription time limit, press Ctrl+C\n'
-    )
-  );
-
-// Start recording and send the microphone input to the Speech API.
-// Ensure SoX is installed, see https://www.npmjs.com/package/node-record-lpcm16#dependencies
-recorder
-  .record({
-    sampleRateHertz: sampleRateHertz,
-    threshold: 0,
-    // Other options, see https://www.npmjs.com/package/node-record-lpcm16#options
-    verbose: false,
-    recordProgram: 'sox', // Try also "arecord" or "sox"
-    silence: '1.0',
-  })
-  .stream()
-  .on('error', console.error)
-  .pipe(recognizeStream);
-
-console.log('Listening, press Ctrl+C to stop.');
+    const request = {
+        audio: audio,
+        config: {
+            encoding: encoding,
+            sampleRateHertz: sampleRateHertz,
+            languageCode: languageCode,
+            alternativeLanguageCodes: ['en-US'],
+            speechContexts: speechContexts
+        },
+        interimResults: false, // If you want interim results, set this to true
+    };
+    const [response] = await client.recognize(request);
+    const transcription = response.results
+    .map(result => result.alternatives[0].transcript)
+    .join('\n');
+    return transcription;
+}
+app.post('/upload_sound', upload.any(), async (req, res) => {
+    console.log("Getting text transcription..");
+    let transcription = await testGoogleTextToSpeech(req.files[0].buffer);
+    console.log("Text transcription: " + transcription);
+    res.status(200).send(transcription);
+});
+app.listen(port, () => {
+    console.log(`Express server listening on port: ${port}...`);
+});
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